Micro, small and medium enterprises (UMKM) in absorbing labor is large enough. But the role of MSMEs in reality is constrained by several things, including capital problems. This is where the role of Shariah Financial Institutions with principal-sharing financing is desirable. Observing such phenomena needs to be examined on several issues; first, the implementation of financing at Syari'ah Financial Institutions in Sumbawa which is considered ideal for micro, small and medium enterprises (UMKM). Secondly, some of the obstacles to the implementation of financing at Syari'ah Financial Institutions in Sumbawa pertain to the principle of profit sharing, and thirdly, the solution to overcome the impediments of financing implementation at Syari'ah Financial Institutions in Sumbawa w This research is a descriptive qualitative research. Data collection techniques that is by combining three methods or the so-called triangulation, among others, interviews, observation and documentation. Data processing will be analyzed and processed descriptively qualitative.ith respect. This research is a descriptive qualitative research. Data collection techniques that is by combining three methods or the so-called triangulation, among others, interviews, observation and documentation. Data processing will be analyzed and processed descriptively qualitative. Research Results Micro, small and medium enterprises (UMKM) are able to absorb a large enough labor. But the role is in fact constrained by several things, including capital problems. This is where the role of Shariah Financial Institutions with principal-sharing financing is desirable. Observing such phenomena needs to be examined on several issues; first, the implementation of financing at Syari'ah Financial Institutions in Sumbawa which is considered ideal for micro, small and medium enterprises (MSMEs). Second, the impediments to the implementation of financing of the Shariah Financial Institutions in Sumbawa with respect to the principle of profit sharing, and thirdly, the solution to overcome the impediments of the financing of the Syari'ah Financial Institutions in Sumbawa with respect to the ideal profit-sharing principle.